<!DOCTYPE html>
<html>
<head>
    <meta charset="UTF-8">
    <title>Title</title>
    <link rel="stylesheet" href="for.css">
    <script src="https://unpkg.com/vue"></script>
</head>
<body>
<div id="vue-app-one">
    <h2>{{title}}</h2>
</div>

<div id="vue-app-two">
    <h2>{{title}}</h2>
    <button v-on:click="x()">改变one的内容</button>

</div>
<script src="vue.js"></script>
</body>
</html>